Brief but Well-Organized U.S. Data on Lung Tumors in Dogs

Today, I am still looking for American data on lung tumors in dogs that are not available in Korea.Summary Pulmonary lobe (“lung”) tumors in dogs and cats are most often the result of cancer cells transferred by blood flow to lung tissue. This type of tumor is called metastatic. Primary pulmonary lobe tumors (tumors that occur in lung tissue) are much less common. Many occur in glandular structures known as “adenocarcinoma” or “bronchial carcinoma”, but may also occur in some lung tissues that provide support.In the “fibrobreeding” cartilage of fiber tissue, “chondrobreeding” blood vessels “vascular breeding” Homes with smokers of other structures or dogs and cats living in environments high in some pollutants such as asbestos are at high risk of developing primary pulmonary lobe tumors. Short-headed species with flat noses (such as bulldogs and pugs) are also more dangerous than long-nosed ones. Signs and symptoms Dogs and cats with primary lung tumors are usually older than middle age. About 25 percent of dogs and cats with primary lung tumors show no signs. The pet may be found to have a tumor accidentally when taking chest X-rays for other reasons. Some dogs and cats appear as follows.Large cough weight loss coma size or tumors that compress important structures can cause difficulty in breathing or reverse flow of food suddenly after meals. In some dogs and cats, pulmonary lobe tumors can spread to other areas or cause edema or bone reactions along toes and lower bones known as “hypertrophic osteopathies.”Diagnostics: Lung tumors are diagnosed by X-ray or computerized topographic (CT) scans of the chest (Figure 1). Lung tumors are difficult to see with X-rays until the diameter reaches at least 0.5 inches. For tumors that are large or close to the chest wall, samples can be collected with needles and syringes. Next, the sample is examined under a microscope to determine the type of tumor. Most animals are older when affected, so they evaluate blood tests and urine to find evidence of other diseases. Screening tests such as abdominal ultrasound may be recommended to evaluate primary tumors elsewhere in the body.Treatment Single pulmonary lobe tumors are surgically removed through large incisions on the side of the chest or by minimally invasive techniques assisted by multiple small incisions and thoracoscopes. Patients with multiple pulmonary lobe tumors have metastatic diseases, i.e., cancer spread elsewhere.Cats and dogs have two lungs, one on the right and one on the left, and each lung is divided into multiple leaves that can be removed separately. Most pulmonary lobe tumors are removed by a thoracic lateral incision known as “thoracic surgery” just behind the front foot. The incision goes between the ribs, but the ribs open and merge again when the pulmonary lobe is removed. Blood vessels to the leaf and air ducts (“bronchias”) are joined together by sutures or staples. Hotchkisses are commonly used because they are much faster and easier than suture sutures. After surgery, the chest tube is placed to remove fluid and air from the chest cavity and inject a local anesthetic to reduce pain. Thoracic ducts typically range from 12 to 12 after surgery Store 24 hours a day. Because these surgeries can be painful, there are several types of pain prevention and treatment available.Extradural anesthesia (injecting painkillers around the spinal cord) intravenous drug pentanyl patch (patch that delivers drugs through the skin) When pets are awake, they stay in hospital until their chest tubes are removed, breathing is improved and pain is managed as oral drugs. Exercise is restricted for 10 to 14 days so that the surgical site can be healed. Some dogs may wear necklaces to prevent bandages or licking or biting incisions for 1-2 weeks after surgery. Depending on the type of tumor based on microscopy of the removed tissue, chemotherapy may be recommended. In addition, veterinarians can suggest chest radiography to check for tumor spread or recurrence during future visits.Anesthesia may be dangerous for older pets, but it increases the risk for pets with respiratory tract problems. Many pets need to use ventilators during surgery to maintain a good oxygen supply. If blood vessels and bronchial tubes are not sealed properly, bleeding and air leakage can be potential problems. Painkillers are needed for several days after surgery. Painful animals have difficulty expanding their lungs and may suffer from lack of oxygen. Despite these potential complications, most dogs and cats survive surgery.Because the surgical site is just behind the front foot, some pets may have difficulty walking for up to two weeks after surgery (especially going up and down stairs), and many can cause swelling along the incision line for several days after surgery.Survival after pulmonary lobectomy for primary pulmonary lobe tumors often averages more than a year. Survival period increases when the tumor is small or located around the pulmonary lobe (15-17.5 months), lymph nodes are small (20 months), and when the tumor can be completely removed. Survival also depends on the type of tumor, and dogs with fully removed adenocarcinoma (19 months) are longer than dogs with squamous cell carcinoma (8 months). The best prognosis is in pets with small diameter well-differentiated papillary carcinoma diagnosed before clinical signs appear and with no evidence of lymph node metastasis. Cats are much more likely to develop primary lung tumors, so their prognosis may not be as good as dogs. https://www.acvs.org/small-animal/lung-lobe-tumors

Lung Leaf Tumor | American College of Veterinary Medicine – ACVST Text Size Increase Current Size: 100% Lung Leaf Tumor Related Terms: Bronchial alveolar carcinoma, pneumonectomy, pulmonary lobectomy (lung lobe tumor), lung cancer, primary lung tumor, bronchogenic cancer Language: English/Espanyol Overview: Pulmonary lobe (lung) tumor in dogs and cats… www.acvs.org

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